New Industry Products

Class Accuracy 05 and Easy-to-Install Smart Current Sensors for Smart Cities

March 09, 2017 by LEM

LEM upgrades “ART” Rogowski current sensor to measure current of up to 10000A AC and beyond with Class Accuracy 0.5.

The ART achieves IEC 61869 Class 0.5 accuracy without the need for additional components like resistors or potentiometers, which can drift over time. In addition, the ART benefits from “Perfect Loop” technology, a unique patented coil clasp that eliminates the inaccuracy caused by sensitivity to the position of the conductor inside the loop as well as providing an innovative, robust and fast “Twist and Click” closure.

An internal shield is provided as standard to guard against external fields, improving accuracy and optimising performance for small current measurements.

The ART series provides the same ease of installation as existing split-core transformers, but with the benefits of being thinner and more flexible.

Whatever the chosen dimension - 50, 70, 125, 175, 200 & 300 mm diameter for the aperture – the ART can be mounted very quickly by simply clipping on to the cable to be measured. Contact with the cable is not necessary, and the ART ensures a high level of safety as well as providing a high rated insulation voltage (1000 V Cat III PD2 - reinforced).

The ART also allows disconnection of the coil to be detected through the use of a security seal passed through a specially designed slot, making it really useful when used with a meter. It can be used in applications requiring a protection degree up to IP 67.

 

About LEM

LEM is a mid-size, global company with production plants in Geneva (Switzerland), Sofia (Bulgaria), Beijing (China) and Machida (Japan). With its regional sales offices close to its clients’ locations, the company offers seamless service around the globe.

Listed on the SIX Swiss Exchange since 1986, the company’s ticker symbol is LEHN.